Staking Operator's Guide

How to operate staking contracts

Configuration and deployment

To deploy a staking contract, you'll need to decide the following parameters:

rewardToken - The ERC20 token in which rewards will be denominated.

stakeToken - The ERC20 token which users will stake to earn rewards.

earningPowerCalculator - The contract that will calculate earning power for the staking system.

maxBumpTip - The max that a searcher bot can earn from updating an account's earning power.

admin - The address which will have permission to manage rewardNotifiers .

Managing Rewards

Reward Notifiers are responsible for distributing rewards to the staking system. The admin of Staker can add and remove them.

There are currently three kinds of reward notifiers:

• TransferFromRewardNotifier - is approved to call transferFrom to move tokens

• TransferRewardNotifier - holds a balance of reward tokens in the notifier. Distributes them over time.

• MintRewardNotifier - mints new reward tokens directly from the token contract

To add a new reward source:

1. Deploy a RewardNotifier

2. Give the notifier tokens with approve, a balance or mint permission as needed.

3. As the admin, call setRewardNotifier(address _rewardNotifier, bool true)

Once the notifier is hooked up, its rewards will flow through the staking system.